Kreg R3 Adjustable Jig

thingiverse

This jig is based off rocklobsters design https://www.thingiverse.com/thing:1621437 with a few modifications. I designed it from scratch in Fusion 360 with a few tweaks to rocklobsters design to get the vice working without the arm falling out when winding it back and to also support the Kreg R3. I also added in metric and imperial measurements as a guide for your R3 that match up with the ones that mount on the side of the device. Parts list: 3x M10 nuts 1x 120mm M10 threaded rod 2x Washers 1x M3x25 or 30 mm screw 1x M3 Washer 1x M3 Wingnut or if you use the locknut method 1x M4x25 or 30 mm screw 1x M4 Washer 1x M4 Wingnut 1x M4 Nylock Aluminium for the vice face and to mount the jig too ( not shown in my pictures as i'm waiting on it to arrive ) To get the vice to work you will need to create a notch at one end of the rod as shown in the attached pictures - i used a lathe at work to do this but this can be done at home with a drill and a file - refer to http://www.hhhh.org/joeboy/resources/hotwire_foam_cutter/hotwire_foam_cutter.html under BASE heading for an example. Once notched - cut your washer or obtain a circlip and clip this onto the notch - this will stop the rod from falling out and moving forward when adjusting the vice. For the turning knob i welded the nut to the other end of the rod and then pushed on printed knob ( tight fitting so force will be needed ) this wont come loose as it's a very tight fit - but you could also add some glue in if you like. If you dont have a welder - then threadlock and or a nylock will work. The Kreg M3 hole stl is so you can use the bottom oval hole of the R3 so you can slide the jig up and down and lock it off into position - i created this because the tiny mount inside the R3 will most probably break over time as there isn't much meat there - so i printed this part a tad oversize so some filling will be needed ( depending on your printer ) and then you push it in to the hole i left it fairly tight and used a hammer and screw to push the part into the R3 so it's a nice solid fit and wont dislodge.